CN103240321A - Automobile drawing die with nitrogen springs - Google Patents

Automobile drawing die with nitrogen springs Download PDF

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Publication number
CN103240321A
CN103240321A CN2013101734898A CN201310173489A CN103240321A CN 103240321 A CN103240321 A CN 103240321A CN 2013101734898 A CN2013101734898 A CN 2013101734898A CN 201310173489 A CN201310173489 A CN 201310173489A CN 103240321 A CN103240321 A CN 103240321A
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CN
China
Prior art keywords
die
nitrogen spring
automobile
cylinder
nitrogen
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013101734898A
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Chinese (zh)
Inventor
桂翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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Filing date
Publication date
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CN2013101734898A priority Critical patent/CN103240321A/en
Publication of CN103240321A publication Critical patent/CN103240321A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an automobile drawing die with nitrogen springs and belongs to the field of automobile drawing dies. The automobile drawing die with the nitrogen springs at least comprises a blank holder, a lower die, the nitrogen springs, a mandrel and an upper die. The lower die is provided a plurality of the nitrogen springs, and every nitrogen spring is correspondingly arranged on every die seat of the lower die. During the drawing process, the blank holding force is stabilized, the blank holder can keep a flexible state through the nitrogen springs to be assembled with the lower die; and the initial thrust force of the nitrogen springs is large, so that the blank holding force is increased and the forming property of a stamping part is improved.

Description

The automobile drawing die of nitrogen spring is installed
Technical field
The present invention relates to automobile drawing die field, particularly a kind of automobile drawing die that nitrogen spring is installed.
Background technology
Drawing die claims cupping tool again, is for the mould with sheet metal pull and stretch cup-shaped or arc part, as draws the vehicle body moulding of automobile.The flange fixing installation of drawing die routine has valve rubber, the gentle pressure pad of spring pad etc.Because mould accuracy of manufacture height, the service life that requires is also high, if therefore in drawing die, adopt conventional flexible member to draw flanging, binder, discharging, just can not satisfy the structural needs of the drawn component with certain difficulty, can not satisfy the stable requirement of stamping quality.
For this reason, the servo-pressing machine industry extensive use that is stamped, servo-pressing machine is to drive eccentric gear by a servomotor, realize the slide block movement process, running speed of sliding block automatic adjustment able to programme, the automatic adjustment able to programme of hydro-drawing pad power, accurate controlled pressure stroke, servo-pressing machine has improved the condition of drawing and stamping quality to a great extent for producing drawn component.But the cost of servo-pressing machine is more a lot of than common hydraulic press and the confidential height of mechanical stamping.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: in actual production, the patrix of mechanical stamping machine top shoe drive drawing die is descending fast, in the moment that patrix contacts with blank holder, has produced bigger impulsive force.Impulsive force not only exerts an influence to stamping machine self life-span, and under the effect of impulsive force, and the instantaneous value of pressure-pad-force has fluctuation in a big way, and the formability of stamping parts is exerted an influence.
Summary of the invention
In order to solve prior art problems, the embodiment of the invention provides a kind of automobile drawing die that nitrogen spring is installed.By nitrogen spring is set, in drawing process, provide top power jointly by push rod and nitrogen spring, increase pressure-pad-force, reduce impulsive force.Described technical scheme is as follows:
A kind of automobile drawing die that nitrogen spring is installed, this drawing die comprises at least: blank holder, counterdie, nitrogen spring, push rod and patrix, described counterdie is provided with several described nitrogen springs, and described each nitrogen spring correspondence is installed on each die holder of described counterdie.
Particularly, described blank holder is the cast hold down gag that is installed in edge between described patrix and the described counterdie.
Particularly, described blank holder comprises at least: binder surface, bottom surface, reinforcement, push rod leg, be global formation, and described binder surface and described bottom surface connect by described reinforcement, described binder surface and described bottom surface are provided with inner stopper, and described bottom surface is provided with described push rod leg.
Particularly, described push rod bottom is fixed on the air cushion die pad of stamping machine work top, contacts with air cushion, and described counterdie is passed on described push rod top, and the top contacts with the push rod leg of described blank holder.
Particularly, described counterdie is installed on the stamping machine work top.
Further, described patrix is provided with pore.
Particularly, described nitrogen spring comprises at least: maintenance screw hole, piston rod, dust ring, snap ring, sealing ring, guide way, O RunddichtringO, cylinder body, air-filled pore, sealed screw, cylinder bottom; Be provided with described guide way in the described cylinder body, described guide way is provided with described O RunddichtringO, described snap ring, described dust ring, adopts described sealing ring sealing between described snap ring, described dust ring and the described cylinder body; Described piston rod is arranged in the described guide way; Described cylinder base is provided with described air-filled pore, described sealed screw, and described cylinder bottom connects with described cylinder body.
Further, the technical parameter of described nitrogen spring: operating temperature is-6 ℃-71 ℃, and the speed of service is 35m/min, and operating pressure is 15-150bar, and the inflation media is nitrogen.
Further, the stroke of described nitrogen spring is greater than the stretching depth 3~10mm of stamping parts.
Further, described nitrogen spring is selected quantity for use, according to the pressure of the nitrogen spring of same diameter pressure maximum divided by total operating pressure.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
By the counterdie at drawing die several nitrogen springs are set, in drawing process, stablize pressure-pad-force, by nitrogen spring blank holder is under a kind of flexible state and the counterdie matched moulds; And because the initial thrust of nitrogen spring is bigger, thereby increased pressure-pad-force, improved the formability of stamping parts.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the automobile drawing die structural representation of the installation nitrogen spring that provides of the embodiment of the invention;
Fig. 2 is the nitrogen spring structural representation of the automobile drawing die of the installation nitrogen spring that provides of the embodiment of the invention.
Each symbolic representation implication is as follows among the figure:
1 blank holder, 1-1 binder surface, 1-2 bottom surface, 1-3 reinforcement, 1-4 push rod leg;
2 counterdies;
3 nitrogen springs, 3-1 keeps in repair screw hole, 3-2 piston rod, 3-3 dust ring, 3-4 snap ring, 3-5 sealing ring, 3-6 guide way, 3-7O RunddichtringO, 3-8 cylinder body, 3-9 air-filled pore, 3-10 sealed screw, 3-11 cylinder bottom;
4 push rods.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Referring to shown in Figure 1, the embodiment of the invention provides a kind of automobile drawing die that nitrogen spring is installed, and this drawing die comprises at least: blank holder 1, counterdie 2, nitrogen spring 3, push rod 4 and patrix parts such as (not drawing among the figure); Described blank holder 1 is prior art, is mounted in the cast hold down gag of edge between the patrix of drawing die and the counterdie, for the marginal portion unstability that prevents tensioning member wrinkling; Described counterdie 2 is mounted on the work top of mechanical stamping machine, and strength or motion by stamping machine pass to metal blank, makes metal blank produce the technological equipment of distortion; Described push rod 4 is for jack-up blank holder 1, and provides certain pressure-pad-force, push rod 4 to be installed in the stamping machine workbench, and its lower end contacts with air cushion, and the upper end contacts with the push rod leg 1-4 of blank holder 1 when work, plays the effect that jack-up blank holder 1 provides pressure-plate-force; Described nitrogen spring 3 is a kind of elastomeric elements of new generation with flex capability, and (10~15Mpa) are sealed in the high-pressure bottle, by external force nitrogen are compressed, and after external force is removed, expand to obtain certain elastic force pressure by high pressure nitrogen with high pressure nitrogen for it; Described patrix is provided with pore, causes demoulding difficulty to prevent drawing part tightly to be adsorbed in patrix.
Particularly, as preferably, described push rod 4 bottoms are fixed on the air cushion die pad of stamping machine work top, the counterdie 2 of drawing die is passed on push rod 4 tops, the top is used for contacting with blank holder 1, several nitrogen springs 3 are installed above the described counterdie 2, and each nitrogen spring 3 correspondence is fixed on each die holder of counterdie 2.Adopt this structure, by calculating the mould stressing conditions and rationally selecting nitrogen spring 3 for use, can be implemented in the drawing process, change pressure-pad-force, push rod 4, nitrogen spring 3 can be acted on the blank holder 1 simultaneously, top power is provided jointly, stablize pressure-pad-force.
Particularly, described blank holder 1 comprises at least: binder surface 1-1, bottom surface 1-2, reinforcement 1-3, push rod leg 1-4 etc., adopt founding mold global formation; Described binder surface 1-1 and bottom surface 1-2 connect by reinforcement 1-3, and described binder surface 1-1 and bottom surface 1-2 are provided with inner stopper, are used for compressing with the patrix marginal portion, and during patrix flanging complete closure, described binder surface 1-1 fits closely with patrix.Middle part, described bottom surface 1-2 bottom surface is provided with push rod leg 1-4, is used for contacting with push rod 4.In drawing process, blank holder 1 namely plays the flanging effect, plays the positioning action of discharging effect and metal blank again, and the location of metal blank realizes that by location-plate (not drawing among the figure) is installed at blank holder 1 this is prior art.
Particularly, described nitrogen spring 3 is prior art, buyable, and single nitrogen spring 3 has a closed system of one's own, can work alone in the position of any hope.The pressure of described nitrogen spring 3 is adjustable within the specific limits, nitrogen spring is the same with spring, and the K line is arranged, and radian slightly just increases and elastic force increases with stroke; During stretching, the stroke of nitrogen spring 3 is greater than the stretching depth 3~10mm of stamping parts.
Referring to shown in Figure 2, described nitrogen spring 3 can select for use the Shenzhen to engrave " U.S. gloomy " board product that vast and boundless five metals mould Co., Ltd produces, and this nitrogen spring 3 comprises at least: maintenance screw hole 3-1, piston rod 3-2, dust ring 3-3, snap ring 3-4, sealing ring 3-5, guide way 3-6, O RunddichtringO 3-7, cylinder body 3-8, air-filled pore 3-9, sealed screw 3-10, cylinder bottom 3-11 etc.; Be provided with guide way 3-6 in the described cylinder body 3-8, guide way 3-6 middle part is provided with O RunddichtringO 3-7, top is provided with snap ring 3-4, dust ring 3-3, adopts sealing ring 3-5 sealing between described snap ring 3-4, dust ring 3-3 and the cylinder body 3-8, guarantees the sealing of piston rod 3-2 and cylinder body 3-8; Described piston rod 3-2 is arranged in the guide way 3-6, and the top of piston rod 3-2 is provided with maintenance screw hole 3-1; The bottom of described cylinder body 3-8 is provided with air-filled pore 3-9, sealed screw 3-10, and sealed screw 3-10 plays protection and enhanced leaktightness effect, and cylinder bottom 3-11 connects with cylinder body 3-8; Cylinder bottom 3-11 is fixed on the smooth fixed head above the counterdie 2.When pressing down piston rod 3-2, the nitrogen that is compressed in the cylinder body 3-8 will produce a reaction force to piston rod 3-2, and gases at high pressure are just finished a working cycles by once compressing and expanding.Described nitrogen spring 3 selects for use producer not unique, not limited by above-mentioned producer, can be preferred according to elastic force pressure.The selection of elastic force pressure can not directly be selected according to the stamping press result calculated, generally will provide 15~20% increment.
Further, the technical parameter of described nitrogen spring 3 is: operating temperature is-6 ℃-71 ℃, and highest running speed is 35m/min, and maximum working pressure is 15-150bar, and the inflation media is nitrogen; The quantity that described nitrogen spring 3 is selected for use can get final product divided by required total pressure according to the pressure of the nitrogen spring of same diameter pressure maximum usually.
Nitrogen spring 3 installation sites can be installed on the counterdie 2 according to the actual mould structure, also can be installed on the blank holder 1, perhaps other positions of mould.The pressure that described several nitrogen springs 3 provide will be gone up evenly at the backing plate (not drawing among the figure) of counterdie 2 and distribute.
The operation principle of the embodiment of the invention:
If nitrogen spring 3 compression travels are less than drawing depth; Drawing when initial, blank holder 1 contacts with push rod 4 tops earlier in descending process, provides top power earlier by push rod 4; After blank holder 1 descending LAP distance, blank holder 1 contacts with nitrogen spring 3 again, and nitrogen spring 3 is subjected to force compresses to produce reverse top power, and simultaneously acted on blank holder 1 on by push rod 4 and nitrogen spring 3 this moment, and top power is provided jointly, stablizes pressure-pad-force.
If nitrogen spring 3 compression travels are greater than drawing depth; Then drawing when initial, can allow blank holder 1 directly contact with nitrogen spring 3, provide top power by nitrogen spring 3 earlier.Behind blank holder 1 a descending segment distance, blank holder 1 contacts with push rod 4 again.
In addition, the advantage that the embodiment of the invention also has adopts nitrogen spring 3 flanging not only to reduce mold height, simplify mould design and manufacturing, make things convenient for mould to install and adjust, prolong the service life of mould, guarantee the stable of stamping parts quality, improved labor productivity.Compare with using servo-pressing machine, relative cost is lower.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. automobile drawing die that nitrogen spring is installed, it is characterized in that, this drawing die comprises at least: blank holder (1), counterdie (2), nitrogen spring (3), push rod (4) and patrix, described counterdie (2) is provided with several described nitrogen springs (3), and described each nitrogen spring (3) correspondence is installed on each die holder of described counterdie (2).
2. the automobile drawing die of installation nitrogen spring according to claim 1 is characterized in that, described blank holder (1) is for being installed in the cast hold down gag of edge between described patrix and the described counterdie (2).
3. the automobile drawing die of installation nitrogen spring according to claim 2, it is characterized in that, described blank holder (1) comprises at least: binder surface (1-1), bottom surface (1-2), reinforcement (1-3), push rod leg (1-4), be global formation, described binder surface (1-1) and described bottom surface (1-2) connect by described reinforcement (1-3), described binder surface (1-1) and described bottom surface (1-2) are provided with inner stopper, and described bottom surface (1-2) is provided with described push rod leg (1-4).
4. the automobile drawing die of installation nitrogen spring according to claim 1, it is characterized in that, described push rod (4) bottom is fixed on the air cushion die pad of stamping machine work top, contact with air cushion, described counterdie (2) is passed on described push rod (4) top, and the top contacts with the push rod leg (1-4) of described blank holder (1).
5. the automobile drawing die of installation nitrogen spring according to claim 1 is characterized in that, described counterdie (2) is installed on the stamping machine work top.
6. the automobile drawing die of installation nitrogen spring according to claim 1 is characterized in that, described patrix is provided with pore.
7. the automobile drawing die of installation nitrogen spring according to claim 1, it is characterized in that described nitrogen spring (3) comprises at least: maintenance screw hole (3-1), piston rod (3-2), dust ring (3-3), snap ring (3-4), sealing ring (3-5), guide way (3-6), O RunddichtringO (3-7), cylinder body (3-8), air-filled pore (3-9), sealed screw (3-10), cylinder bottom (3-11); Be provided with described guide way (3-6) in the described cylinder body (3-8), described guide way (3-6) is provided with described O RunddichtringO (3-7), described snap ring (3-4), described dust ring (3-3), adopts described sealing ring (3-5) sealing between described snap ring (3-4), described dust ring (3-3) and the described cylinder body (3-8); Described piston rod (3-2) is arranged in the described guide way (3-6); Described cylinder body (3-8) bottom is provided with described air-filled pore (3-9), described sealed screw (3-10), and described cylinder bottom (3-11) connects with described cylinder body (3-8).
8. the automobile drawing die of installation nitrogen spring according to claim 7 is characterized in that, the technical parameter of described nitrogen spring (3): operating temperature is-6 ℃-71 ℃, and operating pressure is 15-150bar, and the inflation media is nitrogen.
9. the automobile drawing die of installation nitrogen spring according to claim 7 is characterized in that, the stroke of described nitrogen spring (3) is greater than the stretching depth 3~10mm of stamping parts.
10. the automobile drawing die of installation nitrogen spring according to claim 1 is characterized in that, described nitrogen spring (3) is selected quantity for use, according to the pressure of the nitrogen spring of same diameter pressure maximum divided by total operating pressure.
CN2013101734898A 2013-05-10 2013-05-10 Automobile drawing die with nitrogen springs Pending CN103240321A (en)

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Application Number Priority Date Filing Date Title
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CN2013101734898A CN103240321A (en) 2013-05-10 2013-05-10 Automobile drawing die with nitrogen springs

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128513A (en) * 2014-06-26 2014-11-05 梧州恒声电子科技有限公司 Method of selecting nitrogen springs for metal mold
CN104384351A (en) * 2014-10-20 2015-03-04 柳州市益宏汽车配件有限公司 Engine heat shield drawing die
CN104785636A (en) * 2015-04-09 2015-07-22 奇瑞汽车股份有限公司 Stretching mold

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CN202752417U (en) * 2012-09-05 2013-02-27 江苏华强模具科技有限公司 Mold of adopting nitrogen springs to replace oil press ejector rod

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SE0001876L (en) * 2000-05-19 2001-11-20
CN2725624Y (en) * 2004-09-16 2005-09-14 重庆工学院 Nitrogen spring possessing high reliability dynamic sealing structure
CN201279549Y (en) * 2008-10-06 2009-07-29 广州普什精密模具有限公司 Double-float drawing die for back seat-pan stamping piece of vehicle seat
CN101491819A (en) * 2009-03-12 2009-07-29 长春三友汽车部件制造有限公司 Sedan B-post high-strength plate cold stretching-forming die and technique
CN201625726U (en) * 2010-04-15 2010-11-10 重庆理工大学 Forming die with controllable draw bead added with radial pushing force
CN202752417U (en) * 2012-09-05 2013-02-27 江苏华强模具科技有限公司 Mold of adopting nitrogen springs to replace oil press ejector rod

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Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128513A (en) * 2014-06-26 2014-11-05 梧州恒声电子科技有限公司 Method of selecting nitrogen springs for metal mold
CN104384351A (en) * 2014-10-20 2015-03-04 柳州市益宏汽车配件有限公司 Engine heat shield drawing die
CN104785636A (en) * 2015-04-09 2015-07-22 奇瑞汽车股份有限公司 Stretching mold

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